Heineich osteemafn and chaeles laoeoix



Free,

HEINRICH OSTERMANN AND CHARLES LACROIX, OF GENEVA, SlVlTZEIt LAND, ASSIGNORS TO THE USINE GENEVOISE DE DEGROSSISSAGE DOR,

OF SAME PLACE.

lVl ETA LLIC ALLOY.

SPECIFICATION forming part of Letters Patent No. 388,147, dated August 21, 1888.

Application filed April 25, 1888. Serial No. 271,841,

To all whom, it may concern.-

Be it known that we, HEINRICH OSTER- MANN, chemist, and CHARLES LAOROIX, director of the Usine Gcnevoise dc Degrossissage Dor, both residing in the city of Geneva, in Switzerland, have invented a new and useful Non-Magnetic Metallic Alloy, of which the following is a specification.

The invention consists of a new non magnetic metallic alloy, the purpose of which is to replace steel in the manufacture of different parts of watch-movements. and especially of watchescapements.

The present alloy has proved to secure in a most perfect manner the compensation of the balance-wheel and hair-spring in variable temperatures when used in place of steel. It is composedof a combination of gold, palladium, copper, silver, cobalt, Wolfram, rhodium, and platine, which are suitably combined together in the following proportions: thirty to forty parts of gold, thirty to forty parts of palliadium, ten to twen ty parts of copper, 0.1 to 5 parts of silver, O.1\\to 2.5 parts of cobalt, 0.1

(No specimens.)

to 5 parts of Wolfram, 0.1, to 5 parts of rhodium, and 0.1 to 5 parts of plutineh Having thus described our invention, we claim 1. A metallic alloy composed of gold, pallzy dium, copper, silver, cobalt, Wolfram, rhodium, and plzitine, for the purpose specified.

2. A metallic alloy composed of thirty to forty parts of gold, thirty to forty parts of palladium, ten to twenty parts of copper, onetenth of a part to live parts of silver, one-tenth of a part to two and a half parts of cobalt, onetenth of a part to five parts of Wolfram, onetenth of a part to five parts of rhodium, and one-tenth of a part to five parts of plajtine, for the purpose specified.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

HEINRICH OSTERMANX. CHARLES LAGROIX. WVitnesses:

E. IMnR-SormniDEu, L. T. ADAMS. 

